John gardner



(No Model.)

J. GARDNRR.

PUNGRING AND DRAWING PRESS. No. 271,831.

f .j lmtented4 Peb. 6,1883.

.Ly y2 NTTED STATES NPATENT OFFICE."

JOHN GARDNER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T() THE WIN- CHESTER REPEATING ARMS-COMPANY, OF SAME PLACE.

PUNCHING AND DRAWING PRESS.

- SPECIFICATION forming part of Letters Patent No. 271,831, dated February 6A, 1883.

Application filed August 28, 1882. (No model.)

an upper side view of the cross-head which' A carries the cuttiiigpunch, enlarged; Fig. 4, a vertical central section through the punches and die, enlarged 5' Fig. 5, the disk cut by the punch; Fig. 6, the cup.

This invention relates to an improvement in `2o double-action presses, such as used for the operation of what is commonly called cuppingthat is to say, in which one punch entersa die to cut a disk from the sheet placed therein, whilel a smaller punch working concentrically through the cutting-punch forces the disk cut' by the tirst punch down through a die ot'smaller diameter, so as to draw the disk into acup shape, Fig. 5 representing the disk as cut from the sheet, and Fig.v6 a 3o vertical section ot' the cupdrawn from the disk. The cups are used for various purposes. My invention, however, 'is intended more especially for drawing cups for the manufacture of cartridgeshells, but is equally applicable for other purposes. vIn this class or' presses two .independent slides are employed, the onecarrying a hollow cutting-punch, the other the internal drawing-punch, and arranged so that the first bead operates in advance of the sec- 4o 0nd, and so that the disk is iirst cut. The seci 5o machines great diiiiculty has been experienced in adjusting the dies and punches relatively toeachother. To obviate these difficulties is the `object of my invention ;v and it consists in the arrangement of the parts for independent ad'- justmenteach oi'another, as more fully herein- 55 after described.

A 'represents the die-block; B, the crossbead carrying the cuttingpnnches, and C the cross-head carrying the drawing-punches, each operated independently by the driving-shaft, 6o and timed relatively to each other in theusual manner, too well known to require particular description. r Y

In the die-block the dies a are arranged in two series correspon'dingto the two transverse 65 lines of cuts to be made, thewcuts indicated by the larger diameters in Fig. 3, those in one series standing in line between those ot' the next series, so that the cuts are made inthe usual manner of punching and with the least 7o l possible waste of metal.

Above the die is a plate, b, between which land the dies the sheet D passes, assecn in- Fg.4,in the usual manner, tbe plateb serving to hold the sheet down upon the die, and '75 so as to prevent the plate from lifting with the punch. These dies may be arranged and secured-in the usual manner. Theirupperinternal 4diameter corresponds to the size ot' the disk to beniade, the portion` below to the diameter 8o of the drawn cup.v i

The cross-head B has vertical perforations d through it, corresponding substantiallyfto the severaldies below. Into these perforations or openings d the several cutting-dies e are arranged.

The dies e are constructed with their working end corresponding to the diameter of the die and ot' the disk to he cut. A They are provided with a shoulder, f, to rest and take a 9o bearing against the under sidev of the cross! ,headl B. The-'body h ot' the die is of'solnewhatless diameter' than the opening d in the cross-head, as seen in Fig. 4:. `The upper end of the bodyis threaded, and onto this threaded end a. nut, t', is turned to a hard bearing `upon the uppersideof thecross-head. This nutabove and shoulder-below clamp the punch firmly to the cross-head, and because the body of the punch is of less diameter than the opening roo in the head below.

through the cross-head the punch may be adjusted relatively to the die below by simply loosening the nut t', properly setting the punch, and then returning ,the clamping-nut t'.

The diesbeingproperlyadjusted,the punches free or unclamped in their seats in 'the crosshead, the cross-head is brought down until the ,punches properly enter and stand in the dies. Then, when so entered, the clamping-nuts are screwed down, thereby securing the punches in their proper relative position to the dies, each punch having its own independent adjustment, and, when adjusted, secured by clamping in ka diametrical line, prevents the cramping ot' the punches in the dies, so as to cause them to bind or improperly work there-V in, as is unavoidably the casein the usual diametrical or radial clamping adjustment.

The second cross-head C, carriesa holder, E, into which freely slides a flat plate, F. This holder is arranged directly over the punches The plate F has perforationsoropeningslcorrespondingtothepunches below. Into the openings or seats Z in the plate the drawing-punches L are arranged. These punches correspond to the internal diameter ofthe cup to be drawn, and the cutting-punches e are hollow, the opening through them corresponding to the drawing-punches, as seen in Fig. 4, and so that the drawingpunch will play freely therein up and down.

Each punch is independently held in the plate, preferably by making an annular groove, fm,

4, in the upper end of the punches, and then introducing a transverse follower, at, intp the edge of the plate to engage said groove, as seen in Fig. 4, and so that the end ot' the punches may stand against the under surface of the holder E.

The opening in the plate for the punches L is made larger in diameter than that end ot' the punches, so as to allow play therein, substantiallyas do the openings through the head, andso that in adjusting the punches inthe plate below the drawing-punches will readily move in their own holder to adapt themselves to the punch belowthat is to say, theyyield readily to permit the adjustment of the punch below and adapt themselves to such movement.

Ifat any time it is desirable to remove either of the punches L without disturbing the punch below, it is done by simply withdrawing the follower n from connection with the punch; then it will drop down through the punch and die below, and may be replaced by reversing the operation; or if at any time it is desirable to remove one or more ofthe drawing-punches for examina-tion or repairs, it is only necessary to remove thebeadB. The plate F, being free, will pass out wit-h it. Then the punches may be examined, repaired, or whatever it may be necessary to do to them. They The sliding plate F, carrying the drawingpunches, each free for self-adjustment relative to the punches below, may be employed `in presses in which the cutting-punch istxed in its head without adjustment. In such construction the advantages of the self-adjustment'of the drawing-punch relative to tlie cutting punch will be attained.

The dies a are constructed with a shoulder,

1, to take a bearing on a corresponding seat against the thrust of the punching operation. The body extends downward through an opening in the die-holder ot' larger'diameter than the body itself', and so as to permit radial movement ot' the die, with a nut or other clamping device, 8,'below, which will clamp and secure the die in place, so that the die may also be adjusted with relation to the punch. In some cases it may be more convenient to adjust the die than the punch, and vice versa. Therefore I prefer to make both the punch and dies adjustable relativelyfto each other, also the punches to themselves and the dies to themselves, and as seen in Fig. 4.

I claiml. In a punching-press, a hollow cutting'- vpunch constructed with a body of less diameter than its seat in the cross-head, and with a shoulder to take a bearing against the downward force of the cross-head, and with a clamping device upon the opposite end of the punch to permit the adjustment of the punch in the cross-head, with a drawing-punch operated' independently through the cutting-punch, and hung in a seatin the second cross-head, above said seat, of larger diameter than the drawingpuich, whereby the radial adjustment of the cutting-punch will be correspondinglyimparted to thedrawing-punch, and mechanism, su b s'tantially such as described, to impart a reciprocating movement to said cross headsv and punches, substantially as described.

2. The combination, with the cross-head B, ofthe cutting-punches, the cross-head C, the sliding plate F, arranged therein, the drawingpunches, and mechanism,substantiallysuch as described, to impart a reciprocating movement to said cross-heads and punches, substantially as described.

JOHN GARDNER. Witnesses;

T. G. BENNETT, A. W. HoorEa.

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